Portions of this product Copyright 1996-2000 Glyph & Cog, LLC.
Some versions of this product also use the Xpdf tools
pdftotext, pdfinfo and pdfdetach from Glyph &
Cog, LLC, licensed under the GNU General Public License,
here. Source code, with Thunderstone's
modifications as a patch file, is available at
https://ftp.thunderstone.com/pub/epi-gpl/xpdf-4.06/.